John Harradine and Tom Smith
Abstract: This paper describes a model for predicting the path of aerial shells and Roman candle comets. This model, incorporated in a Microsoft® Excel-based freeware program, SHELLCALC©, predicts the trajectoryof these fireworks using point mass equations for range and height. These equations are modifi ed to take into consideration mortar/candle angle, launch altitude above sea level, wind speed and direction, comet consumption, air density and terrain, and incorporate an approximation of shell drift through tumbling motion and mortar balloting. The graphical output from the model also incorporates typical shell burst diameters.
Keywords: Shells, comets, ballistics, trajectory, fall-out
NOTE – A new version of the Shellcalc© program is now available at a dedicated website – please click here
Ref: JPyro, Issue 22, 2005, pp9-15
© Journal of Pyrotechnics and CarnDu Ltd